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Michigan companies briefly regained 20 slots on the elite Fortune 500 list of top revenue-producing companies this week. But the advancement is very short-lived. The list includes 20 companies currently based in Michigan, but Bloomfield Hills-based PulteGroup’s previously announced headquarters move to Atlanta is nearly complete.

Pulte (NYSE: PHM), which ranked at No. 501 last year, advances to No. 446 in the newly released 2014 list from Fortune global business magazine after reporting 17.8 percent revenue growth to $5.68 billion for 2013. The magazine ranks U.S. companies based on revenue, including discontinued operations and excluding excise taxes, for the most recent fiscal year ending on or before Jan. 31.

Pulte is in the midst of relocating its headquarters from the 225,000-square-foot Pulte Building at 100 Bloomfield Hills Pkwy. to Atlanta.

The homebuilding company, which has already occupied 24,000 square feet of One Capital City Plaza in that city since March 21, expected to grow its footprint there to 101,000 square feet starting June 1. About 54 employees in Pulte's Michigan homebuilding operations will remain here after the move.

Jim Zeumer, vice president of investor relations and corporate communications at PulteGroup, said in a statement the relocation to Atlanta is ongoing and the company anticipates its personnel in most departments would be housed in Atlanta by Sept. 1.

The Pulte addition returns Michigan to a total of 20 Fortune 500 companies, to rank No. 9 among states by total businesses on the list. Troy auto supplier Meritor Inc., a staple of previous Fortune 500 lists, slid to No. 536 last year and is now No. 634, after revenue fell 16.3 percent to $3.7 billion.

Manufacturers accounted for 13 of the 20 ranking Michigan companies.Detroit once again is home to the most Fortune 500 headquarters in Michigan, at three companies — General Motors Co. (NYSE:GM, No. 7 at $155.4 billion revenue), Ally Financial Inc. (OTC:ALFI, No. 273 at $10.3 billion) and DTE Energy Co. (NYSE:DTE, No. 290 at $9.66 billion).

Auburn Hills followed with two corporate headquarters — the American subsidiary of Autoliv Inc. (NYSE: ALV, No. 310 at $8.8 billion) and BorgWarner Inc. (NYSE: BWA, No. 352 at $7.43 billion). No other Michigan city was home to more than one Fortune 500 company, except Bloomfield Hills before the Pulte move.